1 /* $OpenBSD: x509_att.c,v 1.19 2022/05/09 19:19:33 jsing Exp $ */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60
61 #include <openssl/asn1.h>
62 #include <openssl/err.h>
63 #include <openssl/evp.h>
64 #include <openssl/objects.h>
65 #include <openssl/stack.h>
66 #include <openssl/x509.h>
67 #include <openssl/x509v3.h>
68
69 #include "x509_lcl.h"
70
71 int
X509at_get_attr_count(const STACK_OF (X509_ATTRIBUTE)* x)72 X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
73 {
74 return sk_X509_ATTRIBUTE_num(x);
75 }
76
77 int
X509at_get_attr_by_NID(const STACK_OF (X509_ATTRIBUTE)* x,int nid,int lastpos)78 X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid, int lastpos)
79 {
80 ASN1_OBJECT *obj;
81
82 obj = OBJ_nid2obj(nid);
83 if (obj == NULL)
84 return (-2);
85 return (X509at_get_attr_by_OBJ(x, obj, lastpos));
86 }
87
88 int
X509at_get_attr_by_OBJ(const STACK_OF (X509_ATTRIBUTE)* sk,const ASN1_OBJECT * obj,int lastpos)89 X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk,
90 const ASN1_OBJECT *obj, int lastpos)
91 {
92 int n;
93 X509_ATTRIBUTE *ex;
94
95 if (sk == NULL)
96 return (-1);
97 lastpos++;
98 if (lastpos < 0)
99 lastpos = 0;
100 n = sk_X509_ATTRIBUTE_num(sk);
101 for (; lastpos < n; lastpos++) {
102 ex = sk_X509_ATTRIBUTE_value(sk, lastpos);
103 if (OBJ_cmp(ex->object, obj) == 0)
104 return (lastpos);
105 }
106 return (-1);
107 }
108
109 X509_ATTRIBUTE *
X509at_get_attr(const STACK_OF (X509_ATTRIBUTE)* x,int loc)110 X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
111 {
112 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
113 return NULL;
114 else
115 return sk_X509_ATTRIBUTE_value(x, loc);
116 }
117
118 X509_ATTRIBUTE *
X509at_delete_attr(STACK_OF (X509_ATTRIBUTE)* x,int loc)119 X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
120 {
121 X509_ATTRIBUTE *ret;
122
123 if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
124 return (NULL);
125 ret = sk_X509_ATTRIBUTE_delete(x, loc);
126 return (ret);
127 }
128
STACK_OF(X509_ATTRIBUTE)129 STACK_OF(X509_ATTRIBUTE) *
130 X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x, X509_ATTRIBUTE *attr)
131 {
132 X509_ATTRIBUTE *new_attr = NULL;
133 STACK_OF(X509_ATTRIBUTE) *sk = NULL;
134
135 if (x == NULL) {
136 X509error(ERR_R_PASSED_NULL_PARAMETER);
137 return (NULL);
138 }
139
140 if (*x == NULL) {
141 if ((sk = sk_X509_ATTRIBUTE_new_null()) == NULL)
142 goto err;
143 } else
144 sk = *x;
145
146 if ((new_attr = X509_ATTRIBUTE_dup(attr)) == NULL)
147 goto err2;
148 if (!sk_X509_ATTRIBUTE_push(sk, new_attr))
149 goto err;
150 if (*x == NULL)
151 *x = sk;
152 return (sk);
153
154 err:
155 X509error(ERR_R_MALLOC_FAILURE);
156 err2:
157 if (new_attr != NULL)
158 X509_ATTRIBUTE_free(new_attr);
159 if (sk != NULL && sk != *x)
160 sk_X509_ATTRIBUTE_free(sk);
161 return (NULL);
162 }
163
STACK_OF(X509_ATTRIBUTE)164 STACK_OF(X509_ATTRIBUTE) *
165 X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x, const ASN1_OBJECT *obj,
166 int type, const unsigned char *bytes, int len)
167 {
168 X509_ATTRIBUTE *attr;
169 STACK_OF(X509_ATTRIBUTE) *ret;
170
171 attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
172 if (!attr)
173 return 0;
174 ret = X509at_add1_attr(x, attr);
175 X509_ATTRIBUTE_free(attr);
176 return ret;
177 }
178
STACK_OF(X509_ATTRIBUTE)179 STACK_OF(X509_ATTRIBUTE) *
180 X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x, int nid, int type,
181 const unsigned char *bytes, int len)
182 {
183 X509_ATTRIBUTE *attr;
184 STACK_OF(X509_ATTRIBUTE) *ret;
185
186 attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
187 if (!attr)
188 return 0;
189 ret = X509at_add1_attr(x, attr);
190 X509_ATTRIBUTE_free(attr);
191 return ret;
192 }
193
STACK_OF(X509_ATTRIBUTE)194 STACK_OF(X509_ATTRIBUTE) *
195 X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x, const char *attrname,
196 int type, const unsigned char *bytes, int len)
197 {
198 X509_ATTRIBUTE *attr;
199 STACK_OF(X509_ATTRIBUTE) *ret;
200
201 attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
202 if (!attr)
203 return 0;
204 ret = X509at_add1_attr(x, attr);
205 X509_ATTRIBUTE_free(attr);
206 return ret;
207 }
208
209 void *
X509at_get0_data_by_OBJ(STACK_OF (X509_ATTRIBUTE)* x,const ASN1_OBJECT * obj,int lastpos,int type)210 X509at_get0_data_by_OBJ(STACK_OF(X509_ATTRIBUTE) *x, const ASN1_OBJECT *obj,
211 int lastpos, int type)
212 {
213 int i;
214 X509_ATTRIBUTE *at;
215
216 i = X509at_get_attr_by_OBJ(x, obj, lastpos);
217 if (i == -1)
218 return NULL;
219 if ((lastpos <= -2) && (X509at_get_attr_by_OBJ(x, obj, i) != -1))
220 return NULL;
221 at = X509at_get_attr(x, i);
222 if (lastpos <= -3 && (X509_ATTRIBUTE_count(at) != 1))
223 return NULL;
224 return X509_ATTRIBUTE_get0_data(at, 0, type, NULL);
225 }
226
227 X509_ATTRIBUTE *
X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE ** attr,int nid,int atrtype,const void * data,int len)228 X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid, int atrtype,
229 const void *data, int len)
230 {
231 ASN1_OBJECT *obj;
232 X509_ATTRIBUTE *ret;
233
234 obj = OBJ_nid2obj(nid);
235 if (obj == NULL) {
236 X509error(X509_R_UNKNOWN_NID);
237 return (NULL);
238 }
239 ret = X509_ATTRIBUTE_create_by_OBJ(attr, obj, atrtype, data, len);
240 if (ret == NULL)
241 ASN1_OBJECT_free(obj);
242 return (ret);
243 }
244
245 X509_ATTRIBUTE *
X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE ** attr,const ASN1_OBJECT * obj,int atrtype,const void * data,int len)246 X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr, const ASN1_OBJECT *obj,
247 int atrtype, const void *data, int len)
248 {
249 X509_ATTRIBUTE *ret;
250
251 if ((attr == NULL) || (*attr == NULL)) {
252 if ((ret = X509_ATTRIBUTE_new()) == NULL) {
253 X509error(ERR_R_MALLOC_FAILURE);
254 return (NULL);
255 }
256 } else
257 ret= *attr;
258
259 if (!X509_ATTRIBUTE_set1_object(ret, obj))
260 goto err;
261 if (!X509_ATTRIBUTE_set1_data(ret, atrtype, data, len))
262 goto err;
263
264 if ((attr != NULL) && (*attr == NULL))
265 *attr = ret;
266 return (ret);
267
268 err:
269 if ((attr == NULL) || (ret != *attr))
270 X509_ATTRIBUTE_free(ret);
271 return (NULL);
272 }
273
274 X509_ATTRIBUTE *
X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE ** attr,const char * atrname,int type,const unsigned char * bytes,int len)275 X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr, const char *atrname,
276 int type, const unsigned char *bytes, int len)
277 {
278 ASN1_OBJECT *obj;
279 X509_ATTRIBUTE *nattr;
280
281 obj = OBJ_txt2obj(atrname, 0);
282 if (obj == NULL) {
283 X509error(X509_R_INVALID_FIELD_NAME);
284 ERR_asprintf_error_data("name=%s", atrname);
285 return (NULL);
286 }
287 nattr = X509_ATTRIBUTE_create_by_OBJ(attr, obj, type, bytes, len);
288 ASN1_OBJECT_free(obj);
289 return nattr;
290 }
291
292 int
X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE * attr,const ASN1_OBJECT * obj)293 X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
294 {
295 if ((attr == NULL) || (obj == NULL))
296 return (0);
297 ASN1_OBJECT_free(attr->object);
298 attr->object = OBJ_dup(obj);
299 return attr->object != NULL;
300 }
301
302 int
X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE * attr,int attrtype,const void * data,int len)303 X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data,
304 int len)
305 {
306 ASN1_TYPE *ttmp = NULL;
307 ASN1_STRING *stmp = NULL;
308 int atype = 0;
309
310 if (!attr)
311 return 0;
312 if (attrtype & MBSTRING_FLAG) {
313 stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
314 OBJ_obj2nid(attr->object));
315 if (!stmp) {
316 X509error(ERR_R_ASN1_LIB);
317 return 0;
318 }
319 atype = stmp->type;
320 } else if (len != -1){
321 if (!(stmp = ASN1_STRING_type_new(attrtype)))
322 goto err;
323 if (!ASN1_STRING_set(stmp, data, len))
324 goto err;
325 atype = attrtype;
326 }
327 /*
328 * This is a bit naughty because the attribute should really have
329 * at least one value but some types use and zero length SET and
330 * require this.
331 */
332 if (attrtype == 0) {
333 ASN1_STRING_free(stmp);
334 return 1;
335 }
336
337 if (!(ttmp = ASN1_TYPE_new()))
338 goto err;
339 if ((len == -1) && !(attrtype & MBSTRING_FLAG)) {
340 if (!ASN1_TYPE_set1(ttmp, attrtype, data))
341 goto err;
342 } else
343 ASN1_TYPE_set(ttmp, atype, stmp);
344 if (!sk_ASN1_TYPE_push(attr->set, ttmp))
345 goto err;
346 return 1;
347
348 err:
349 ASN1_TYPE_free(ttmp);
350 ASN1_STRING_free(stmp);
351 X509error(ERR_R_MALLOC_FAILURE);
352 return 0;
353 }
354
355 int
X509_ATTRIBUTE_count(const X509_ATTRIBUTE * attr)356 X509_ATTRIBUTE_count(const X509_ATTRIBUTE *attr)
357 {
358 if (attr == NULL)
359 return 0;
360
361 return sk_ASN1_TYPE_num(attr->set);
362 }
363
364 ASN1_OBJECT *
X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE * attr)365 X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
366 {
367 if (attr == NULL)
368 return (NULL);
369 return (attr->object);
370 }
371
372 void *
X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE * attr,int idx,int atrtype,void * data)373 X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx, int atrtype, void *data)
374 {
375 ASN1_TYPE *ttmp;
376
377 ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
378 if (!ttmp)
379 return NULL;
380 if (atrtype != ASN1_TYPE_get(ttmp)){
381 X509error(X509_R_WRONG_TYPE);
382 return NULL;
383 }
384 return ttmp->value.ptr;
385 }
386
387 ASN1_TYPE *
X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE * attr,int idx)388 X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
389 {
390 if (attr == NULL)
391 return (NULL);
392
393 return sk_ASN1_TYPE_value(attr->set, idx);
394 }
395